Linear active disturbance rejection control for PWM converters in flexible DC traction power supply system

The advanced urban rail flexible DC traction power supply system has the advantages of controllable voltage of traction network, good power quality of medium-voltage network, and energy can flow in both directions. In order to improve the voltage control and anti-interference ability of PWM converters in flexible systems, a control strategy based on linear active disturbance rejection is studied in this paper. The simulation results show that it has better voltage control effect and anti-interference ability than the traditional PI control.